[time-nuts] DIY FE-5680A lobotomy (disable temp compensation)
not.again at btinternet.com
Thu Jul 3 21:35:41 EDT 2014
I am thinking about testing a heat pipe on a fan cooled setup I use.
The first temp controlled chassis I did used a peltier and works very
well, but was a lot more work to do and is much more power hungry.
The main problem I find is not the temp controller itself, but rather
the change in the temperature across the chassis as the ambient
changes. However good the temp controller is, it only controls a
single point, but other points further away from the sensing
thermistor can vary a lot.
I noticed you posted a picture of a heat pipe cooler a couple of weeks
ago - did you happen to compare the temperature across the unit with
direct fan cooling and the heat pipe cooler, or with different heat
On Sat, 28 Jun 2014 12:37:37 -0400 (EDT), you wrote:
>Will someone beside us use heat pipe. Would love to have an impendent
>input. What does it take to get a test going. Scott has done a lot of work, how
>about some one else step up to the plate. There are a lot of time nuts out
>there with the 5680A,many for the first time will have a very good
>reference and some of our experts with proper equipment can make a big difference.
>In a message dated 6/28/2014 12:20:12 P.M. Eastern Daylight Time,
>newell+timenuts at n5tnl.com writes:
>At 04:32 AM 6/28/2014, wb6bnq wrote:
>>monitoring process ? In other words have you traced out the
>>connections to see what is driving the pin you think is the temperature
>No. I've only traced back from the ADC input to the voltage divider.
>>The next big question is have you monitored the frequency and its
>>stability, externally, to observe what effects are taking place when
>>you disable this input to the A/D ?
>I have not.
>>That sounds complicated and messy but may be easier than it
>>appears. An appropriate container would be:
>It does sound messy. I don't think I'm willing to dunk one of my units.
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